Cited by 163Cancer-related Molecular PathwaysHeat shock proteins researchDNA Repair Mechanisms

DNA damage-induced MDMX degradation is mediated by MDM2

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Kawai, Hidehiko, Wiederschain, Dmitri, Kitao, Hiroyuki, Stuart, Jeremy, Tsai, Kelvin K.C., Yuan, Zhi-Min·2003·Journal of Biological Chemistry

Abstract

Although genetic studies have demonstrated that MDMX is essential to maintain p53 activity at low levels in non-stressed cells, it is unknown whether MDMX regulates p53 activation by DNA damage. We show here that DNA damage-induced p53 induction is associated with rapid down-regulation of the MDMX protein. Significantly, interference with MDMX down-regulation results in the suppression of p53 activation by genotoxic stress. We also demonstrate that DNA damage-induced MDMX reduction is mediated by MDM2, which targets MDMX for proteasomal degradation by a distinct mechanism that permits preferential MDMX degradation and therefore ensures optimal p53 activation.

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Crossref · 10.1074/jbc.m308295200

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Authors
Kawai, H., Wiederschain, D., Kitao, H., Stuart, J., Tsai, K. K. C., & Yuan, Z.-M.
Affiliations
Harvard University (US)
Corresponding author
Yuan, Zhi-Min
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2003-11
Volume
278
Issue
46
Pages
45946-45953
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2070023783
Cited by
163
References
15
Citations by year
2025: 2 · 2023: 4 · 2022: 4 · 2021: 2 · 2020: 3 · 2019: 4 · 2018: 4 · 2017: 6 · 2016: 15 · 2015: 4 · 2014: 11 · 2013: 6 · 2012: 14
FWCI
3.90
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5t32es007155-24)
  • National Cancer Institute (R01CA085679, R01CA85679)
  • National Institute of Environmental Health Sciences (T32-ES07155)
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
Keywords
MDMX, MDM2, p53 activation, DNA damage response, proteasomal degradation, protein degradation, genotoxic stress, p53 regulation
MeSH terms
Cell Cycle, Cysteine Endopeptidases, DNA Damage, Humans, Microscopy, Fluorescence, Multienzyme Complexes, Nuclear Proteins, Plasmids, Precipitin Tests, Proto-Oncogene Proteins, Retroviridae, Time Factors, Transfection, Blotting, Western, Down-Regulation, Tumor Suppressor Protein p53, Reverse Transcriptase Polymerase Chain Reaction, Ubiquitin, Cell Line, Tumor, Proteasome Endopeptidase Complex, Proto-Oncogene Proteins c-mdm2

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